On 4/15/05 at 4:48 AM, stevebg at adelphia.net (Steve Gray) wrote:
>I have a list
>intertemp[[1]] = {{14, 17, {0.7929, 0.4366}, {2.8146, 11.3986}}
The curly braces above are not balanced. Did you mean
{14, 17, {0.7929, 0.4366}, {2.8146, 11.3986}}
?
>and a simple function
>modxx[axx_] := axx[[2]] = Mod[axx[[2]], 14, 1];
>When I do modxx[intertemp[[1]]] I get this:
>Set::setps: {14, 17, {0.792902, <<19>>}, {2.81469, 11.3986}} in
>assignment of part is not a symbol.
>What does this mean and how can I do it correctly? I must be making
>a very simple error. I want the 17 to become 3 with no other
>changes.
Assuming there is an extrac "{" in what you posted the following does what you want:
In[1]:=
x = {14, 17, {0.7929, 0.4366}, {2.8146, 11.3986}};
In[2]:=
modxx[axx_] := ReplacePart[axx, Mod[axx[[2]], 14, 1], 2]
In[3]:=
x = modxx[x]
Out[3]=
{14, 3, {0.7929, 0.4366}, {2.8146, 11.3986}}
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